The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 1997
Filed:
Sep. 28, 1995
Nippondenso Co., Ltd., Kariya, JP;
Abstract
Disclosed is a commutator type rotary electric machine which is designed to simplify the structure through reduction of number of component parts and allows to significantly enhance heat radiation from a brush. Both end bracket supports a rotary shaft and cylindrical brush holder are made of metal. The cylindrical brush holder is secured to the end bracket. The surface of internal periphery of brush holder is covered by an electrical insulator. Since it is sufficient for the electrical insulator to have a thickness effective to electrically insulate the brush from the cylindrical brush holder, heat generating from brush is effectively conducted to the end bracket and radiated from it. Since the end cylindrical brush holder is made of metals, it is strong, cheap and can be machined easily and both the cylindrical brush holder and the end bracket can be combined and secured easily and, since they can be molded as an integral component, the rigidity can be enhanced, manufacturing processes can be simplified and number of component parts can be reduced.